Patent GB-190422967-A (GB)
Title: Improvements in Machines for Shaping and Preparing Staves for Casks Barrels or the like
Inventor: JAMIESON WILLIAM
Filed: 1904-10-25
Granted: 1905-10-25
Abstract: 22,967. Jamieson, W., and Burn, R. Oct. 25. Sawing.-Staves are shaped and prepared in the machine illustrated. Along the centre of the bed or table 1, Fig. 1, is a series of pairs of feedrollers, the upper rollers 2 being adjustable by a screw and hand-wheel 3, all the under rollers being driven by bevel-wheels 4 on the shaft 5, In advance of the first pair of rollers and under the table is a cutter to impart a concave form to the underside of the stave, the upper side being made convex by the cutter 18. Up to this point, the lower roughened feed-rollers are mounted on their shafts by a ratchet-and-pawl arrangement, so as to be free to revolve at a greater speed than their shafts, necessitated by the fact that the succeeding rollers revolve at a greater speed, so as to cause a space to be left between the ends of each stave. The stave next passes under the pattern-wheel 23, which governs the curve to be given to its edges, the wheel either having its periphery narrow at one part and widening towards the opposite part of its circumference, or, as at 24, Fig. 6, it may widen to a quarter of its circumference. In line with the stave are cutters 28, which form the curve and also cut a tongue on one side and a groove on the other. The cutters are fixed on shafts 29, mounted on swinging arms 30, carrying wheels 33 which run on the sides of the pattern-wheel, which is provided with a device to bring the narrowest part opposite the wheels 33 after each operation. Fixed to the side of the pattern-wheel is a cruciform piece 39, Fig. 7, having pins 41 on two opposite arms and notches 42 on the others. A weight 44, carried by rods 43 on the arm 25, is kept down by the lever 45 and the weight 46. The weight 44 is lifted by the pin 41 as a stave causes the wheel to rotate, and in descending causes the pattern-wheel to turn the complete half-circle, when it is secured by a pin dropping into the notch 42. One of the pins 41 is removed if the pattern-wheel is required to make a complete revolution. The stave is then fed between adjusting-fences comprising pairs of rollers 48, Fig. 8. attached to levers 49, pivoted under the table and connected as shown, and reaches the travelling band 53, Fig. 4, passing over rollers 54, 55 and the flat table 57. One edge of the band is longer than the other, and it is arranged that the shorter edge is kept tight while the longer sags down between the roller 54 and the edge of the table. This causes a stave passed endways on to the band to be turned to lie across the band by the time it reaches the table. Projections 63 on the endless chains 62 then carry the stave under adjustable shoes or pressers 65, Fig. 10, which hold the stave down while cutters 68 form the groove or croze. These cutters, with others to chamfer the ends of the stave, are arranged on a shaft 70, Fig. 4, passing through sliding blocks, which are connected by means of levers with a cam 75. As the cam revolves, it causes the cutters to be gradually raised and lowered as the stave passes over them, thus ensuring the croze being a segment of a circle. The stave is then carried under other shoes while saws or cutters on the shaft 77 either cross-cut or hollow out the middle portion of the stave to facilitate bending. The last part of the machine is mounted on a bed-plate with slots along which the movable piece 80, Fig. 10, may be adjusted.